Method of forming armature-coils.



J. C. SIMONSEN.

METHOD bF FORMING ARMATURE COILS. APPLICATIONFILED NOV. 1. 1913.

1 1 7 1 1 48. Patented Feb. 8, 1916.

[72 re fa a {4/3 Cfiarlas S'zmanaen W mwww UNITED STATES PATENT OFFICE.

J OHAN CHARLES SIMONSEN, OF DETROIT. MICHIGAN. ASSIGNOR T0 CHALMERS MOTOR COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

METHOD OF FORMING ARMATURE-COILS.

Application filed November 1. 1913.

To all whom it may concern:

Be it known that I, JoHAN CHARLES Si- MONSEN, a subject of the King of Norway, residing at Detroit, in the county of VVa'yne and State of Michigan, have invented certain new and useful Improvements in Methods of Forming Armature-Coils, of which the following is a specification, reference being 'had therein to the accompanying drawings.

The invention relates to the manufacture of fashioned coils for armature windings of a type extensively used in the art. These coils comprise a plurality of convolutions,

. 'With the present invention I have overcome this difliculty, first, in constructing the coil so that both termina s lead directly to the outermost convolutions, and further by a method of winding which permits of expeditiously constructing such acoil.

In the drawings: Figure-1 is a perspective View, partly in section, of the coil be fore refashioning; Fig. 2 is a fragmentary perspective view of the completely fashioned coil; Fig. 3 is an end elevation of the coil as first wound; and Fig. 4 is anelevation of the mandrel upon which the coil is wound.

The essential characteristic of my improved coil is the leading of both terminal Wires to the outer convolutions, instead of one leading to'an outer and one to an inner convolution, as heretofore constructed. This result I obtain by winding the coil. upon a suitable mandrel so as to form, first, a series of convolutions progressively de- Specification of Letters Patent.

Patented Feb. s. 1916.

Serial No. 798,646.

terminals leading to the outer pair.

For convenience in forming such coils, I preferably proceed in the following man ner: A mandrel-A is formed with a series of spiral steps A A etc, each step being adapted to receive a convolution of the coil and to fashion the same to telescopewith the succeeding convolution. A corresponding mandrel B having steps B 13*, etc., is ar-. ranged adjacent to the mandrel A, and the whole is mounted upon a suitable winding head C for imparting rotary movement thereto. The operator then winds acoil upon this mandrel, such as. indicated in Fig. 3, after which the sections A and B are separated, permitting of the removal .ofthe coil and the telescoping of the same to form'the construction shown in Fig. 1. The coil when wound as described, may be clipped and bound in the usuai manner and thenrefashioned, but thesesubsequent steps form no part of the present invention.

\Vhat I claim as my invention is 1. The method of forming armature coils,

comprising the winding of an open spiral tf having progressively decreasing convolutions followed by progressively increasing convolutions, and in subsequently telescoping said convolutions to form a" closed coil with both terminals leading from the outer convolutions thereof. f

2. The method of forming armature'coils, consisting in the winding of an open armature coil having spaced spiral convolutions and the subsequent telescoping of the spiral convolutions to form a closed coilwith both terminals leading from the outer convrr lotions thereof.

3. The method of forming armature, coils,

comprising the winding of an open coil 'havw'96 ing reversely spaced spirals of progressively decreasing and progressively increasing con- In testimeny whereof I affix my signavqlutlons, and m the subsequent telescoplng ture 1n presence of two wltnesses. of the Spaced decreaslng and mcreaslng spiral convolutions to form a closed coil JOHAN CHARLES SIMONSEN' 6 having parallel pairs of convolutions with \Vitnesses:

terminals leading. fromithe outer convolu- A. C. GIBSON,

tions thereof. CLARENCE S. REEF. 

